Fixed bug which caused a cursor leak if an error was thrown while

processing the execution of a query.

Author: anthony-tuininga

doc/src/release_notes.rst

@@ -15,6 +15,8 @@ Thin Mode Changes
 
 #)  Fixed bug connecting to databases with older 11g password verifiers
     (`issue 189 <https://github.com/oracle/python-oracledb/issues/189>`__).
+#)  Fixed bug which caused a cursor leak if an error was thrown while
+    processing the execution of a query.
 #)  Fixed bugs in the implementation of the statement cache.
 
 Thick Mode Changes

src/oracledb/impl/thin/messages.pyx

@@ -741,7 +741,8 @@ cdef class MessageWithData(Message):
             ThinConnImpl conn_impl = self.conn_impl
             object exc_type
         Message._process_error_info(self, buf)
-        cursor_impl._statement._cursor_id = self.error_info.cursor_id
+        if self.error_info.cursor_id != 0:
+            cursor_impl._statement._cursor_id = self.error_info.cursor_id
         if not cursor_impl._statement._is_plsql and not self.in_fetch:
             cursor_impl.rowcount = self.error_info.rowcount
         cursor_impl._lastrowid = self.error_info.rowid